CN103911144A - Europium ion-doped high-molecular fluorescent encoding microsphere and preparation method thereof - Google Patents
Europium ion-doped high-molecular fluorescent encoding microsphere and preparation method thereof Download PDFInfo
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- CN103911144A CN103911144A CN201410061583.9A CN201410061583A CN103911144A CN 103911144 A CN103911144 A CN 103911144A CN 201410061583 A CN201410061583 A CN 201410061583A CN 103911144 A CN103911144 A CN 103911144A
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Abstract
The invention relates to a europium ion-doped high-molecular fluorescent encoding microsphere and a preparation method thereof. The fluorescent encoding microsphere has an average particle size of 5 to 10 mu m, maximum excitation wavelength of about 300 to 350 nm and maximum emission wavelength nearby 395 to 611 nm, respectively. The preparation method comprises the following steps: dispersing surface sulfonated polystyrene-divinyl benzene cross-linking (PDSVB) microspheres in a mixed solvent and adding a Eu<3+> solution, wherein a mass ratio of the microspheres to Eu<3+> is 24:1 to 480: 1; and carrying out vibration treatment at a temperature of 70 to 90 DEG C for 0.5 to 5 h and then carrying out centrifugal washing and freeze drying so as to obtain the europium ion-doped high-molecular fluorescent encoding microsphere. According to the invention, through changing addition amounts of europium ions, a series of fluorescent encoding microspheres with different europium ion-PDSVB microsphere fluorescence-emission intensity ratios are prepared and can be used in fields like biological detection and medical diagnosis.
Description
Technical field
The present invention relates to a kind of high molecular fluorescent coding microball and preparation method thereof, be particularly related to the fluorescence-encoded micro-beads that the different europium ions of doping measure the fluorescent emission intensity ratio of a series of different europium ions and crosslinked (PSDVB) microballoon of polystyrene-divinylbenzene, belong to luminescent material technical field.
Background technology
Rare earth element has unique luminosity, has been developed as multiple important luminescent material, and europium is the representative of a quasi-representative.After europium ion is excited, abundant fluorescence spectrum can be launched, the electromagnetic radiation of ultraviolet to infrared various wavelength can be launched.Typically there is the red fluorescence of 611nm left and right.
In some matrix, can successfully obtain the base material of some functionalization by europium ion-doped.Document (
colloids and Surfaces A:Physicochem. Eng. Aspects326 (2008) 109 – 114) reported europium ion-doped to inorganic silicon ball, obtain the inorganic fluorescence silicon ball of europium doping, the method just simple by europium ion-doped to inorganic silicon ball, and the silicon spherolite footpath heterogeneity obtaining.Document (
j. AM. CHEM. SOC.2009,131,15276 – 15283) report first europium ion and organic molecule formation inner complex, be then doped on polystyrene microsphere, obtain the fluorescent microsphere of europium doping.The method experiment condition is loaded down with trivial details, must first prepare europium ion inner complex, and workload is large.
Before the present invention makes, Suzhou Nano-Micro Bio-technology Co., Ltd. produces and sells crosslinked (PSDVB) microballoon of polystyrene-divinylbenzene of a kind of sulfonic acid surfactant base, its maximum excitation wavelength is 330 left and right (300～350 nm), maximum emission wavelength is near 395 nm, after being excited, this microballoon only has a kind of emission wavelength, can not carry out fluorescence-encodedly, can only be used as simple substrate sphere, range of application is restricted.
Summary of the invention
Problem to be solved of the present invention is the existing deficiency of fluorescent microsphere for europium doping in prior art, provide a kind of preparation technology simple, high molecular fluorescent microballoons of the europium doped ion that product structure is stable, pattern is good and preparation method thereof, the microballoon providing can be launched two kinds of fluorescence after exciting simultaneously, by changing the add-on of europium ion, prepare the fluorescence-encoded micro-beads of a series of different europium ions and the fluorescent emission intensity ratio of PSDVB microballoon.
The technical scheme that realizes the object of the invention is to provide a kind of high molecular fluorescent coding microball of europium doped ion, and its median size is 5～10 μ M, and maximum excitation wavelength is 300～350 nm, and maximum emission wavelength is respectively near 395nm and 611nm.
Technical solution of the present invention also comprises a kind of preparation method of high molecular fluorescent coding microball of europium doped ion as above, comprises the steps:
1, by Eu
2o
3be dissolved in CH
3in COOH, be made into Eu with deionized water
3+solution;
2, taking polyvinylpyrrolidone as dispersion agent, the polystyrene-divinylbenzene crosslinked microsphere of sulfonic acid surfactant base is dispersed in mixed solvent, described mixed solvent is for by volume, Virahol: deionized water=1:1, and the concentration of europium ion in mixed solvent is 3.8 × 10
-3～7.6 × 10
-2mg/mL; The Eu that adds step (1) to obtain
3+solution, microballoon and Eu
3+mass ratio be 24:1～480:1; Be that under the condition of 70～90 DEG C, concussion is processed 0.5～5 hour in temperature, after centrifuge washing, lyophilize are processed, obtain the high molecular fluorescent coding microball of europium doped.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention adopts the first europium ion solution of system, and europium is doped in microballoon with the form of ion, has made the good fluorescence-encoded micro-beads ground method of surface topography, this technical scheme does not relate to chemical reaction, and therefore, technique is simple, easy to operate, be suitable for suitability for industrialized production.
3, the present invention by change the add-on of europium ion prepare a series of different europium ions with the fluorescent emission intensity of PSDVB microballoon than (I
2/ I
1) fluorescence-encoded micro-beads, can be applicable to the field such as biological detection, medical diagnosis, wherein, I
1for the fluorescent emission intensity of PSDVB microballoon, I
2for the fluorescent emission intensity of europium ion.
Brief description of the drawings
Fig. 1 is the principle schematic that the present invention prepares the fluorescence-encoded micro-beads of europium doped ion;
Fig. 2 is the electron scanning micrograph of the high molecular fluorescent coding microball of the europium doped ion that provides of the embodiment of the present invention 1;
Fig. 3 is the fluorescence spectrum figure of the fluorescence-encoded micro-beads of the different europium add-ons that provide of the embodiment of the present invention 1;
Fig. 4 is mean value and the fluctuation range of the fluorescent emission intensity value of europium ion and PSDVB microballoon in the fluorescence-encoded micro-beads of the different europium add-ons that provide of the embodiment of the present invention 1.
Embodiment
Below in conjunction with drawings and Examples, technical solution of the present invention is further elaborated.
Embodiment 1
The present embodiment provides the high molecular fluorescent coding microball of europium doped ion, and its preparation process is as follows:
1, preparation Eu
3+solution
By the Eu of 0.0352g
2o
3be dissolved in 1mL CH
3in COOH, be made into the solution of 100mL with deionized water, add thermal oscillation and dissolve, obtain water white Eu
3+solution.
2, the high molecular fluorescent coding microball of preparation europium doped ion
In the Erlenmeyer flask of 100mL, add solvent 40mL, the Eu of Virahol: deionized water=1:1
3+solution (M
eu=0～20 μ mol), PSDVB microballoon 75 ㎎ (being provided by Suzhou Nano-Micro Bio-technology Co., Ltd.), polyvinylpyrrolidone (PVP) 60 ㎎, put into high-temperature oscillation incubator (arranging 80 DEG C, 220 revs/min), 80 DEG C of constant temperature reaction 3 hours.After reaction finishes, by centrifugal mixture (2000 revs/min), then with deionized water, microballoon washing (is first shaken: 1000 revs/min for three times, centrifugal: 2000 revs/min, remove supernatant liquor, add again deionized water and repeat concussion, centrifugal), then lyophilize, obtains the high molecular fluorescent coding microball of europium doped ion.
Referring to accompanying drawing 1, it is the principle schematic that the present invention prepares the fluorescence-encoded micro-beads of europium doped ion, wherein, and I
1for the fluorescent emission intensity of PSDVB microballoon, I
2for the fluorescent emission intensity of europium ion.
Referring to accompanying drawing 2, it is the electron scanning micrograph of the high molecular fluorescent coding microball of the europium doped ion that provides of the present embodiment; As seen from Figure 2, this fluorescence-encoded micro-beads pattern is regular, uniform particle diameter, and surface is comparatively smooth, and median size is about 10 μ M.
Referring to accompanying drawing 3, it is the fluorescence spectrum figure of the fluorescence-encoded micro-beads of the different europium add-ons that provide of the present embodiment; As seen from Figure 3, along with the increase of europium add-on, the fluorescent emission intensity of setting PSDVB microballoon is constant, and on fluorescence-encoded micro-beads, the fluorescent emission intensity of europium strengthens gradually.
Referring to accompanying drawing 4, it is mean value and the fluctuation range of the fluorescent emission intensity ratio of europium ion and PSDVB microballoon in the fluorescence-encoded micro-beads of the different europium add-ons that provide of the present embodiment, wherein, and I
1for the fluorescent emission intensity of PSDVB microballoon, I
2for the fluorescent emission intensity of europium ion.As seen from Figure 4, along with the increase of europium add-on, the fluorescent emission intensity ratio (I of europium ion and PSDVB microballoon in fluorescence-encoded micro-beads
2/ I
1) mean value increase gradually, obtain a different set of I
2/ I
1mean value, be a group coding microballoon.
Claims (2)
1. a high molecular fluorescent coding microball for europium doped ion, is characterized in that: its median size is 5～10 μ M, and maximum excitation wavelength is 300～350 nm left and right, and maximum emission wavelength is respectively near 395nm and 611nm.
2. a preparation method for the high molecular fluorescent coding microball of europium doped ion as claimed in claim 1, is characterized in that comprising the steps:
(1) by Eu
2o
3be dissolved in CH
3in COOH, be made into Eu with deionized water
3+solution;
(2) taking polyvinylpyrrolidone as dispersion agent, the polystyrene-divinylbenzene crosslinked microsphere of sulfonic acid surfactant base is dispersed in mixed solvent, described mixed solvent is for by volume, Virahol: deionized water=1:1, and the concentration of europium ion in mixed solvent is 3.8 × 10
-3～7.6 × 10
-2mg/mL; The Eu that adds step (1) to obtain
3+solution, microballoon and Eu
3+mass ratio be 24:1～480:1; Be that under the condition of 70～90 DEG C, concussion is processed 0.5～5 hour in temperature, after centrifuge washing, lyophilize are processed, obtain the high molecular fluorescent coding microball of europium doped.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105623651A (en) * | 2016-03-07 | 2016-06-01 | 江苏医诺万细胞诊疗有限公司 | Composite microsphere marker for conducting fluorescent marking on rear earth and preparation method of composite microsphere marker |
| CN111748342A (en) * | 2020-07-13 | 2020-10-09 | 常熟涤纶有限公司 | Polyacrylic acid high-fluorescence microsphere capable of being identified by fluorescence and preparation method thereof |
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| CN111748342A (en) * | 2020-07-13 | 2020-10-09 | 常熟涤纶有限公司 | Polyacrylic acid high-fluorescence microsphere capable of being identified by fluorescence and preparation method thereof |
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| CN103911144B (en) | 2015-11-18 |
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